package com.atguigu.gmall.util;

import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class HttpclientUtil {

    public static String doGet(String url){
        // 创建 httpClient 对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        // 创建http GET请求
        HttpGet httpGet = new HttpGet(url);
        CloseableHttpResponse response = null;
        try {
            // 执行请求
            response = httpClient.execute(httpGet);
            // 判断返回状态是否为200
            if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
                HttpEntity entity = response.getEntity();
                String result = EntityUtils.toString(entity, "UTF-8");
                EntityUtils.consume(entity);
                httpClient.close();
                return result;
            }
            httpClient.close();
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
        return null;
    }

    public static String doPost(String url, Map<String, String> paramMap){
        // 创建HttpClient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        // 创建http Post请求
        HttpPost httpPost = new HttpPost(url);
        CloseableHttpResponse response;
        try {
            if(paramMap != null){
                List<BasicNameValuePair> list = new ArrayList<>();
                for(Map.Entry<String, String> entry : paramMap.entrySet()){
                    list.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
                }
                HttpEntity httpEntity = new UrlEncodedFormEntity(list, "utf-8");
                httpPost.setEntity(httpEntity);
            }

            // 执行请求
            response = httpClient.execute(httpPost);

            // 判断返回状态是否为200
            if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
                HttpEntity entity = response.getEntity();
                String result = EntityUtils.toString(entity, "UTF-8");
                EntityUtils.consume(entity);
                httpClient.close();
                return result;
            }
            httpClient.close();
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
        return null;
    }
}
